public class Example5_3 {
  public static void main (String args[]){
    CheapGoods cheapGoods=new CheapGoods();
    cheapGoods.newSetWeight(198);
    System.out.println("对象cheapGoods的weight的值是："+cheapGoods.weight);
    System.out.println("cheapGoods用子类新增的优惠方法计算价格："+cheapGoods.newGetPrice());
    cheapGoods.oldSetWeight(198.987);
    System.out.println("cheapGoods使用继承方法（无优惠）计算价格："+cheapGoods.oldGetPrice());
  }
}
